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Electronic Principles

Electronic Principles
Holes are the minority carriers in which type of semiconductor?

Extrinsic
Intrinsic
n-type
p-type
None of these

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Electronic Principles
The transistor has a collector current of 10 mA and a base current of 40 mA. What is the current gain of the transistor?

350 µA
0.25 µA
250 µA
300 µA
None of these

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Electronic Principles
What is the barrier potential of a silicon diode at room temperature?

1 V
2 m V per degree Celsius
0.3V
0.7V
None of these

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Electronic Principles
Which one of the following is most likely used for measuring the rate of electron flow?

Wattmeter
None of these
Ohmmeter
Ammeter
Voltmeter

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Electronic Principles
When the collector current increases, what does the current gain do?

stays the same
any of the above
None of these
increases
decreases

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Electronic Principles
A power transformer steps 100 V down to 10 V. If the current in its primary winding is 2 A, what is the current in the secondary winding?

50 A
20 A
0.20833333333333
None of these

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